Introduction to React¶

What is React?¶

React is a JavaScript library for building user interfaces. It allows developers to create reusable UI components and manage the state of an application efficiently.

Why use React?¶

Component-Based: React allows developers to build encapsulated components that manage their own state. These components can be reused throughout the application, leading to more maintainable and organized code.
Virtual DOM: React creates a virtual representation of the actual DOM in the browser. When changes are made, React compares the virtual DOM with the real DOM and updates only the changed parts. This results in faster and more efficient updates.
Flexibility: React can be integrated with various backend technologies and can be used in combination with other JavaScript libraries or frameworks.
Strong Community Support: With a vast community and backing from Facebook, React has a plethora of resources, tutorials, and third-party tools available.

React's Virtual DOM¶

The Virtual DOM is a lightweight copy of the actual DOM elements. The rendering engine can quickly make changes to the Virtual DOM and subsequently update the real DOM in a more efficient and optimized manner.

Setting Up a React Environment¶

Using Create React App¶

One of the easiest ways to set up a new React project is by using Create React App (CRA). CRA is a tool built by the React team that sets up a new React project with a good default configuration. To create a new app, you can use the following command:

npx create-react-app my-app

This will create a new directory called my-app with all the files you need to start a React project.

Folder Structure¶

After creating a new app with CRA, you'll notice several directories and files. The most important ones are:

public/: Contains static files like the index.html file.
src/: Contains the JavaScript files for your React components. This is where most of your development will take place.
package.json: A file that lists the dependencies of the project and contains various configuration settings.

Explanation of `package.json`¶

The package.json file is crucial in any JavaScript project. It contains metadata about the project, such as its name and version. It also lists the project's dependencies and devDependencies. Additionally, it can contain scripts that can be run using npm, like starting the development server or building the project for production.

React Components¶

Components are the building blocks of a React application. They allow you to break down your UI into reusable and independent pieces.

Functional vs. Class Components¶

There are two main types of components in React:

Functional Components: These are simpler and are just JavaScript functions that return JSX. They can use hooks to add state and side effects.
```
function Welcome(props) {
return <h1>Hello, {props.name}</h1>;
}
```
Class Components: These are more complex and can have lifecycle methods and state. They are defined using ES6 classes.
```
class Welcome extends React.Component {
render() {
 return <h1>Hello, {this.props.name}</h1>;
}
}
```

JSX Syntax¶

JSX stands for JavaScript XML. It allows you to write HTML-like code inside your JavaScript. It's a syntax extension for JavaScript, recommended by React. With JSX, you can describe your UI in a way that looks like HTML, but is actually backed by JavaScript objects.

Props and State¶

Props (short for "properties") are a way of passing data from parent to child components. They are read-only and help to make your components reusable.

State, on the other hand, is data that is private to a component and can change over time. State is mutable, and changes in state trigger a re-render of the component.

React Lifecycle Methods (for Class Components)¶

Lifecycle methods are special methods that automatically get called as your component achieves certain milestones.

`constructor()`¶

This method is called when an instance of the component is being created and inserted into the DOM. It's a good place to initialize state and bind event handlers.

`render()`¶

The render method is required and will be called whenever the component's state or props change. It should return a single React element.

`componentDidMount()`¶

This method is called once the component is added to the DOM. It's a good place to set up any subscriptions or fetch data.

`componentDidUpdate(prevProps, prevState)`¶

This method is called after the component updates (i.e., after a change in state or props). It's a good place to perform network requests as long as you compare the current props to the previous ones to avoid unnecessary network requests.

`componentWillUnmount()`¶

This method is called right before the component is removed from the DOM. It's a good place to clean up any subscriptions or timers to prevent memory leaks.

React Hooks (for Functional Components)¶

Hooks are a relatively new addition to React and allow functional components to have state and side effects. Before hooks, these features were only available in class components.

`useState`¶

The useState hook allows you to add state to functional components. It returns an array with the current state value and a function to update it.

const [count, setCount] = useState(0);

`useEffect`¶

The useEffect hook lets you perform side effects in functional components. It can replicate lifecycle behavior found in class components.

useEffect(() => {
  document.title = `You clicked ${count} times`;
}, [count]); // Only re-run the effect if count changes

Custom Hooks¶

You can also create your own custom hooks to reuse stateful logic between components. Custom hooks are a way to extract component logic into reusable functions.

Event Handling in React¶

Handling events in React is similar to handling events in plain JavaScript. However, there are some syntax differences.

Handling Click Events¶

In React, you can use the onClick attribute to handle click events.

<button onClick={handleClick}>Click me</button>

Where handleClick is a function defined in your component.

Handling Form Input¶

For form inputs, you can use the onChange attribute to listen for changes to the input value.

<input type="text" onChange={handleInputChange} />

Where handleInputChange is a function that updates the component's state with the new input value.

React Router¶

React Router is a popular library for adding navigation into your React application. It allows you to define routes for your app and render different components based on the current URL.

Setting Up React Router¶

To use React Router, you first need to install it:

npm install react-router-dom

Then, you can import the necessary components from the react-router-dom package.

Creating Routes¶

The Route component is used to define a route that will render a specific component when the path matches the current URL.

<Route path="/about" component={About} />

This will render the About component when the URL is /about.

Link and NavLink¶

The Link component is used to create links in your app. It renders an anchor tag that uses the to prop to determine where it should navigate.

<Link to="/about">About</Link>

The NavLink component is similar to Link, but it can also apply an active class to the link when its path matches the current URL. This is useful for highlighting the active link in a navigation menu.

Relating the React-Front Project to Our Discussion¶

The React-Front project serves as a practical example of many of the concepts we've discussed in this notebook. Let's delve into how the project embodies these concepts and what we can learn from it.

Components¶

React-Front utilizes various components such as LoginWrapper and CoverLettersWrapper. These handle functionalities like user authentication and displaying cover letters. This is a direct application of the component-based architecture we discussed, emphasizing the importance of modular and reusable UI pieces in React.

State Management¶

The project showcases the use of state, especially within components like LoginWrapper. This ties back to our section on React state, demonstrating the dynamic nature of React applications and how data can change over time within components.

Integration of Advanced Libraries¶

React-Front integrates several advanced libraries, showcasing the versatility and extensibility of React:

React-PDF: Used for managing PDF files, highlighting React's capability to handle complex document formats.
Axios: A promise-based HTTP client used for making asynchronous requests, aligning with our discussion on event handling and API calls in React.
AceEditor: A high-performance code editor integrated into the web application, emphasizing the power of React in creating interactive web-based development environments.
AOS: An animation library used to enhance user experience and interactivity on scroll.
ReactMarkdown: Allows the application to render markdown input as HTML, providing a user-friendly approach to text formatting.

Potential Integration of React Router¶

While not explicitly mentioned, if React-Front has multiple views or pages, it could benefit from React Router. This would allow for efficient routing and navigation within the application, a concept we covered earlier in the notebook.

Future Topics to Explore¶

Given the complexity and features of the React-Front project, there are several advanced topics that can be explored further:

State Management Libraries: While React provides its own state management, for larger applications, libraries like Redux or MobX can be beneficial.
Testing: Ensuring the reliability of the application through unit tests, integration tests, and end-to-end tests using libraries like Jest and React Testing Library.
Performance Optimization: Techniques to optimize the performance of React applications, including lazy loading, code splitting, and memoization.
Server-Side Rendering (SSR): For improved performance and SEO, SSR can be implemented using frameworks like Next.js.

In conclusion, the React-Front project is a testament to the power and flexibility of React. It provides a real-world example that resonates with the concepts we've discussed, and there's potential to delve deeper into more advanced topics in the future.

Introduction to the React-Front Application¶

The React-Front application is a dynamic and interactive web project hosted on GitHub. Developed using React, it showcases modern web development practices and the power of React as a front-end library.

Key Features and Components¶

User Authentication: The application has components like LoginWrapper that handle user authentication, ensuring secure access to the platform.
Document Management: With the integration of the react-pdf library, the application can efficiently manage and display PDF files, catering to users who need to work with document formats.
Code Editing: The inclusion of AceEditor provides users with a high-performance code editor, making the application suitable for web-based development tasks.
Text Formatting: The use of ReactMarkdown allows users to format text input in markdown and render it as HTML, enhancing the user experience for content creation and display.
Animations: The AOS library is used to add animations, enhancing the visual appeal and interactivity of the application.

Overview¶

The React-Front application is a testament to the versatility of React. It integrates various libraries and tools to provide a comprehensive user experience. Whether it's handling user authentication, managing documents, editing code, or displaying formatted text, the application offers a range of functionalities that cater to diverse user needs.

For developers, the project serves as an excellent reference for building robust and interactive web applications using React. The codebase provides insights into best practices, component structure, state management, and the integration of external libraries.

Appendix: Introduction to JavaScript¶

JavaScript is a versatile and widely-used programming language primarily known for its role in web development. It allows developers to add interactivity to websites, making them dynamic and user-friendly. Over the years, JavaScript has evolved significantly, and with the advent of frameworks and libraries like React, Angular, and Vue.js, its capabilities have expanded beyond just the browser.

Basics of JavaScript¶

Variables¶

Variables are used to store data values. In JavaScript, you can declare a variable using var, let (ES6), or const (ES6 for constant values).

var name = 'John';
let age = 25;
const pi = 3.14159;

Data Types¶

JavaScript has several data types, including:

Number: Represents both integers and floating-point numbers.
String: Represents a sequence of characters.
Boolean: Represents a true or false value.
Object: Represents a collection of named values.
Array: Represents a list of values.
Null: Represents a non-value.
Undefined: Represents a variable that has not been assigned a value.

Functions¶

Functions are blocks of reusable code. They can take parameters and return a value.

function greet(name) {
    return 'Hello, ' + name + '!';
}

Conditional Statements¶

JavaScript supports conditional statements like if, else if, and else to execute different code blocks based on conditions.

Loops¶

Loops are used to execute a block of code repeatedly. JavaScript supports several types of loops, including for, while, and do...while.

Advanced Concepts¶

Asynchronous Programming¶

JavaScript supports asynchronous programming using callbacks, promises, and async/await (ES7).

Closures¶

A closure is a function that has access to its own scope, the scope of the outer function, and the global scope.

The 'this' Keyword¶

In JavaScript, this is a reference to the object on which a method was called or the object being constructed.

Prototypal Inheritance¶

JavaScript uses prototypal inheritance, where objects can inherit properties and methods from other objects.

This appendix provides a brief overview of JavaScript. Given its depth and breadth, there's a lot more to explore and understand. If you're working with React or any other JavaScript framework, a solid understanding of JavaScript fundamentals is crucial.

JavaScript Basics: Variables¶

In JavaScript, variables are used to store data values. A variable can store different types of data, from numbers to strings to objects. Here's how you can declare and initialize variables in JavaScript:

// Using var (older way)
var name = 'John';
var age = 30;

// Using let (introduced in ES6)
let city = 'New York';
let isStudent = true;

// Using const (introduced in ES6 for constant values)
const pi = 3.14159;

JavaScript Basics: Data Types¶

JavaScript has several built-in data types. Understanding these types is crucial as it determines how data can be used in your programs. Let's explore the primary data types in JavaScript:

// Number
let num1 = 10;          // integer
let num2 = 10.5;       // floating-point number

// String
let str = 'Hello World';

// Boolean
let isTrue = true;
let isFalse = false;

// Undefined
let value;

// Null
let emptyValue = null;

// Object
let person = {
    name: 'John',
    age: 30
};

// Array
let fruits = ['apple', 'banana', 'cherry'];

JavaScript Basics: Operators¶

Operators are symbols that perform operations on variables and values. In JavaScript, there are several types of operators, including arithmetic, comparison, logical, and assignment operators. Let's take a look at some common operators and their usage:

// Arithmetic Operators
let sum = 10 + 5;      // addition
let difference = 10 - 5;  // subtraction
let product = 10 * 5;     // multiplication
let quotient = 10 / 5;    // division
let remainder = 10 % 3;   // modulus (remainder)

// Comparison Operators
let isEqual = 10 == '10';     // equality (loose comparison)
let isStrictEqual = 10 === 10;  // strict equality (type + value)
let isNotEqual = 10 != '5';     // inequality
let isGreaterThan = 10 > 5;    // greater than

// Logical Operators
let andOperator = true && false;   // logical AND
let orOperator = true || false;    // logical OR
let notOperator = !true;           // logical NOT

// Assignment Operators
let x = 10;        // assigns the value 10 to x
x += 5;            // adds 5 to x (same as x = x + 5)

JavaScript Basics: Control Structures¶

Control structures allow you to control the flow of your program's execution based on conditions or loops. They are essential for creating dynamic and interactive applications. Let's explore the primary control structures in JavaScript:

// Conditional Statements

let age = 18;

if (age >= 18) {
    console.log('You are an adult.');
} else {
    console.log('You are a minor.');
}

// Loops

// for loop
for (let i = 0; i < 5; i++) {
    console.log('This is loop iteration ' + i);
}

// while loop
let j = 0;
while (j < 5) {
    console.log('This is while loop iteration ' + j);
    j++;
}

// do...while loop
let k = 0;
do {
    console.log('This is do...while loop iteration ' + k);
    k++;
} while (k < 5);

JavaScript Basics: Functions¶

Functions are blocks of reusable code that can take parameters and return a value. They help in organizing and modularizing code, making it more readable and maintainable. Let's delve into how to define and use functions in JavaScript:

// Defining a function
function greet(name) {
    return 'Hello, ' + name + '!';
}

// Calling a function
let message = greet('John');
console.log(message);

// Function with multiple parameters
function addNumbers(a, b) {
    return a + b;
}
let sum = addNumbers(5, 3);
console.log(sum);

// Anonymous function (function without a name)
let multiply = function(x, y) {
    return x * y;
};
console.log(multiply(4, 2));

// Arrow function (introduced in ES6)
let divide = (p, q) => p / q;
console.log(divide(8, 2));

JavaScript Basics: Objects¶

Objects are a fundamental part of JavaScript. They allow you to group related data and functions together. An object can contain properties (key-value pairs) and methods (functions). Let's explore how to create and manipulate objects in JavaScript:

// Creating an object
let person = {
    firstName: 'John',
    lastName: 'Doe',
    age: 30,
    greet: function() {
        return 'Hello, ' + this.firstName + ' ' + this.lastName;
    }
};

// Accessing object properties
console.log(person.firstName);  // John
console.log(person['lastName']);  // Doe

// Calling object method
console.log(person.greet());  // Hello, John Doe

// Adding new properties to an object
person.country = 'USA';
console.log(person);

// Deleting a property from an object
delete person.age;
console.log(person);

JavaScript Basics: Arrays¶

Arrays are used to store multiple values in a single variable. They are list-like objects that provide a way to store ordered collections of items. Arrays are zero-indexed, meaning the first item is accessed with an index of 0. Let's delve into the basics of arrays in JavaScript:

// Creating an array
let fruits = ['apple', 'banana', 'cherry'];

// Accessing array elements
console.log(fruits[0]);  // apple
console.log(fruits[2]);  // cherry

// Modifying array elements
fruits[1] = 'blueberry';
console.log(fruits);  // ['apple', 'blueberry', 'cherry']

// Adding elements to an array
fruits.push('orange');
console.log(fruits);  // ['apple', 'blueberry', 'cherry', 'orange']

// Removing the last element from an array
fruits.pop();
console.log(fruits);  // ['apple', 'blueberry', 'cherry']

// Array length
console.log(fruits.length);  // 3

// Looping through an array
for (let i = 0; i < fruits.length; i++) {
    console.log(fruits[i]);
}

JavaScript Basics: Events¶

Events are actions or occurrences that happen in the browser, often triggered by users interacting with a web page. JavaScript can be used to detect these events and execute code in response. Events can include user actions like clicks, key presses, or mouse movements. Let's explore how to work with events in JavaScript:

// HTML element for demonstration
<button id='myButton'>Click Me!</button>

// JavaScript code to handle the click event
document.getElementById('myButton').addEventListener('click', function() {
    alert('Button was clicked!');
});

// Note: The above code will not execute in this notebook environment, but it demonstrates how to attach an event listener to an HTML element.

// Creating an array
let fruits = ['apple', 'banana', 'cherry'];

// Accessing elements of an array
console.log(fruits[0]);  // apple
console.log(fruits[2]);  // cherry

// Modifying an array
fruits[1] = 'blueberry';
console.log(fruits);  // ['apple', 'blueberry', 'cherry']

// Adding elements to an array
fruits.push('orange');
console.log(fruits);  // ['apple', 'blueberry', 'cherry', 'orange']

// Removing the last element from an array
fruits.pop();
console.log(fruits);  // ['apple', 'blueberry', 'cherry']

// Finding the index of an element in an array
let index = fruits.indexOf('blueberry');
console.log(index);  // 1

// Removing an element from a specific index
fruits.splice(index, 1);
console.log(fruits);  // ['apple', 'cherry']

JavaScript Basics: Error Handling¶

Errors are inevitable in programming. However, JavaScript provides mechanisms to handle errors gracefully without crashing the entire application. The primary way to handle errors in JavaScript is by using the try...catch statement. Let's delve into how to handle errors in JavaScript:

JavaScript Basics: Events¶

Events are actions or occurrences that happen in the browser, often triggered by users interacting with a webpage. JavaScript can be used to detect these events and execute code in response. This allows for dynamic and interactive web applications. Let's explore the basics of handling events in JavaScript:

// Demonstrating try...catch
try {
    // Intentionally causing an error
    let result = unknownFunction();
} catch (error) {
    console.log('An error occurred:', error.message);
}

// Note: The above code will output an error message because 'unknownFunction' is not defined.

// HTML element for demonstration
<button id='myButton'>Click me!</button>

// JavaScript event handling
document.getElementById('myButton').addEventListener('click', function() {
    alert('Button was clicked!');
});

// Another way using named function
function handleButtonClick() {
    alert('Button was clicked again!');
}

document.getElementById('myButton').addEventListener('click', handleButtonClick);

JavaScript Basics: DOM Manipulation¶

The Document Object Model (DOM) represents the structure of an HTML document. With JavaScript, you can manipulate the DOM to change the content, structure, and style of a webpage dynamically. Let's explore some basic DOM manipulation techniques in JavaScript:

JavaScript Basics: Error Handling¶

Errors are inevitable in programming. Instead of letting an error crash your program, JavaScript provides mechanisms to handle them gracefully. The try...catch statement allows you to define a block of code to test for errors and specify how to respond if an error occurs. Let's delve into error handling in JavaScript:

try {
    // Code that may throw an error
    let result = someUndefinedFunction();
} catch (error) {
    // Handle the error
    console.error('An error occurred:', error.message);
} finally {
    // This block is executed regardless of whether an error occurred or not
    console.log('Try...Catch block execution finished.');
}

// HTML elements for demonstration
<div id='myDiv'>This is a div.</div>
<p class='myParagraph'>This is a paragraph.</p>

// JavaScript code for DOM manipulation
let divElement = document.getElementById('myDiv');
divElement.innerHTML = 'The content has been changed!';

let paragraphElements = document.getElementsByClassName('myParagraph');
for (let element of paragraphElements) {
    element.style.color = 'blue';
}

// Note: The above code will not execute in this notebook environment, but it demonstrates basic DOM manipulation techniques.

JavaScript Basics: Events (Continued)¶

Events are crucial for creating interactive web applications. They allow you to define behavior in response to user actions or other changes in the browser. Let's delve deeper into event handling in JavaScript:

JavaScript Basics: DOM Manipulation¶

The Document Object Model (DOM) represents the structure of an HTML document. With JavaScript, you can interact with and manipulate the DOM to change the content, structure, and style of a webpage dynamically. Let's explore some basic DOM manipulation techniques in JavaScript:

// HTML element for demonstration
<button id='eventButton'>Hover Over Me!</button>

// JavaScript code to handle the mouseover event
document.getElementById('eventButton').addEventListener('mouseover', function() {
    alert('Button was hovered over!');
});

// Note: The above code will not execute in this notebook environment, but it demonstrates how to attach a mouseover event listener to an HTML element.

// Selecting an element by its ID
let titleElement = document.getElementById('pageTitle');

// Changing the text content of an element
titleElement.textContent = 'New Title';

// Selecting elements by their class name
let paragraphs = document.getElementsByClassName('contentParagraph');

// Changing the style of an element
titleElement.style.color = 'blue';

// Adding an event listener to an element
titleElement.addEventListener('click', function() {
    alert('Title was clicked!');
});

// Creating a new element and appending it to the DOM
let newParagraph = document.createElement('p');
newParagraph.textContent = 'This is a new paragraph.';
document.body.appendChild(newParagraph);

JavaScript Basics: Timers¶

Timers allow you to execute code at specified intervals or after a delay. They are useful for creating animations, auto-updating content, or delaying the execution of a function. JavaScript provides two main methods for working with timers: setTimeout and setInterval. Let's explore these methods:

JavaScript Basics: Asynchronous Programming¶

JavaScript is single-threaded, meaning it can only do one thing at a time. However, many operations, like fetching data from a server, can take a long time to complete. To avoid blocking the main thread, JavaScript uses asynchronous programming. This allows you to start a long-running operation and move on to other tasks without waiting for the operation to complete. Let's explore the basics of asynchronous programming in JavaScript:

// Using setTimeout to execute code after a delay
setTimeout(function() {
    console.log('This message will be displayed after 2 seconds.');
}, 2000);

// Using setInterval to execute code at regular intervals
let count = 0;
let intervalId = setInterval(function() {
    count++;
    console.log('Interval executed ' + count + ' times.');
    if (count >= 5) {
        clearInterval(intervalId);
    }
}, 1000);

// Note: The above code will not execute in this notebook environment, but it demonstrates the use of timers in JavaScript.

JavaScript Basics: Promises and Async/Await¶

JavaScript is asynchronous by nature, meaning it can perform multiple tasks simultaneously without waiting for one to complete before starting another. Promises and the async/await syntax provide a more readable and manageable way to handle asynchronous operations. Let's delve into these concepts:

// Using callbacks
function fetchData(callback) {
    setTimeout(function() {
        callback('Data fetched!');
    }, 2000);
}

fetchData(function(data) {
    console.log(data);  // Data fetched!
});

// Using Promises
function fetchMoreData() {
    return new Promise(function(resolve, reject) {
        setTimeout(function() {
            resolve('More data fetched!');
        }, 2000);
    });
}

fetchMoreData().then(function(data) {
    console.log(data);  // More data fetched!
}).catch(function(error) {
    console.error('An error occurred:', error);
});

// Using async/await (syntactic sugar over Promises)
async function fetchAllData() {
    let data = await fetchMoreData();
    console.log(data);  // More data fetched!
}

// Creating a Promise
let myPromise = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('Promise resolved!');
    }, 2000);
});

// Using the Promise
myPromise.then((message) => {
    console.log(message);
}).catch((error) => {
    console.log('Error:', error);
});

// Using async/await
async function fetchData() {
    let response = await fetch('https://api.example.com/data');
    let data = await response.json();
    console.log(data);
}

// Note: The above code will not execute in this notebook environment, but it demonstrates the use of Promises and async/await in JavaScript.

JavaScript Basics: ES6 Features¶

ECMAScript 6 (ES6), also known as ECMAScript 2015, introduced several new features to JavaScript, making the language more powerful and flexible. Some of these features include arrow functions, template literals, destructuring, and more. Let's explore some of these ES6 features:

// Arrow Functions
const greet = name => `Hello, ${name}!`;
console.log(greet('Alice'));

// Template Literals
let fruit = 'apple';
let description = `I have an ${fruit} in my bag.`;
console.log(description);

// Destructuring
let person = { firstName: 'John', lastName: 'Doe' };
let { firstName, lastName } = person;
console.log(firstName, lastName);

// Default Parameters
function introduce(name = 'Guest') {
    return `Hello, ${name}!`;
}
console.log(introduce());  // Hello, Guest!
console.log(introduce('Emma'));  // Hello, Emma!

And in your React component, you can fetch this data using the Fetch API:

fetch('/api/data')
  .then(response => response.json())
  .then(data => console.log(data.message));

CORS Handling¶

When making requests from React to Flask running on different ports during development, you might encounter CORS (Cross-Origin Resource Sharing) issues. To handle this, you can use the Flask-CORS extension.

First, install the extension:

pip install Flask-CORS

Then, in your Flask app:

from flask_cors import CORS

CORS(app)

This will allow requests from any origin by default, but you can restrict it to specific origins for better security.

Conclusion¶

Integrating React with Flask allows you to leverage the power of both frameworks. Flask can handle backend logic, database operations, and serve the React app, while React provides a dynamic and interactive frontend. This combination can be particularly powerful for building full-stack web applications.

Introduction to React¶

What is React?¶

Why use React?¶

React's Virtual DOM¶

Setting Up a React Environment¶

Using Create React App¶

Folder Structure¶

Explanation of package.json¶

React Components¶

Functional vs. Class Components¶

JSX Syntax¶

Props and State¶

React Lifecycle Methods (for Class Components)¶

constructor()¶

render()¶

componentDidMount()¶

componentDidUpdate(prevProps, prevState)¶

componentWillUnmount()¶

React Hooks (for Functional Components)¶

useState¶

useEffect¶

Custom Hooks¶

Event Handling in React¶

Handling Click Events¶

Handling Form Input¶

React Router¶

Setting Up React Router¶

Creating Routes¶

Link and NavLink¶

Relating the React-Front Project to Our Discussion¶

Components¶

State Management¶

Integration of Advanced Libraries¶

Potential Integration of React Router¶

Future Topics to Explore¶

Introduction to the React-Front Application¶

Key Features and Components¶

Overview¶

Appendix: Introduction to JavaScript¶

Basics of JavaScript¶

Variables¶

Data Types¶

Functions¶

Conditional Statements¶

Loops¶

Advanced Concepts¶

Asynchronous Programming¶

Closures¶

The 'this' Keyword¶

Prototypal Inheritance¶

JavaScript Basics: Variables¶

JavaScript Basics: Data Types¶

JavaScript Basics: Operators¶

JavaScript Basics: Control Structures¶

JavaScript Basics: Functions¶

JavaScript Basics: Objects¶

JavaScript Basics: Arrays¶

JavaScript Basics: Events¶

JavaScript Basics: Error Handling¶

JavaScript Basics: Events¶

JavaScript Basics: DOM Manipulation¶

JavaScript Basics: Error Handling¶

JavaScript Basics: Events (Continued)¶

JavaScript Basics: DOM Manipulation¶

JavaScript Basics: Timers¶

JavaScript Basics: Asynchronous Programming¶

JavaScript Basics: Promises and Async/Await¶

JavaScript Basics: ES6 Features¶

CORS Handling¶

Conclusion¶

Explanation of `package.json`¶

`constructor()`¶

`render()`¶

`componentDidMount()`¶

`componentDidUpdate(prevProps, prevState)`¶

`componentWillUnmount()`¶

`useState`¶

`useEffect`¶